My Projects

CAN Polling network

I added a variable to Kevin Smith’s library, the remote frame bit requests a response from other nodes on the buss. With this I was able to implement a polling scheme. The master requests a data update every 10 seconds and only then will the remote transmit routine readings. This cuts down chatter on the buss. I also partitioned the 11 bit id field into a 5 bit node identifier and a six bit data type indicator. Each remote station will be assigned a unique identifier, in this photo, the remote is number 31.

Remotes can still broadcast autonomously, for instance a notification that a door is opened will be sent immediately to all master nodes.